Not my valk either but if you are talking about the mod where the glasspack is threaded to a modified header inside truck stacks I can help you out

My '01 valk has the glasspacks that are notched on each side of the outlets so you can make a "T" tool to thread them out of the headers.
Granted it's pretty hard to get a good picture inside a 4" pipe of the glasspack that is in there but here you go.

The outlet is tweaked a little on this glasspack:

The glasspack outlets are up in there pretty far......maybe about 12" (never actually measured it)

A side shot for reference:

If you are wanting to hear them I have a couple of video's of it running.
Out for a ride.....yeah they have a little drone at highway speeds but not to bad
Hope that helps,
Dragon Slayer 129